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author | jhb <jhb@FreeBSD.org> | 2010-10-25 15:28:03 +0000 |
---|---|---|
committer | jhb <jhb@FreeBSD.org> | 2010-10-25 15:28:03 +0000 |
commit | 5979f73be6079303e602db1898bf020384382503 (patch) | |
tree | 55f8f6c7e6782e329b804f5ce95046c4515ba566 /sys/i386 | |
parent | d91b62acb0042d41e473bc7e282aa6b5417a1e6f (diff) | |
download | FreeBSD-src-5979f73be6079303e602db1898bf020384382503.zip FreeBSD-src-5979f73be6079303e602db1898bf020384382503.tar.gz |
Use intr_disable() and intr_restore() instead of frobbing the flags register
directly to disable interrupts.
Reviewed by: bde (earlier version)
MFC after: 2 weeks
Diffstat (limited to 'sys/i386')
-rw-r--r-- | sys/i386/i386/elan-mmcr.c | 7 | ||||
-rw-r--r-- | sys/i386/i386/identcpu.c | 7 | ||||
-rw-r--r-- | sys/i386/i386/initcpu.c | 79 | ||||
-rw-r--r-- | sys/i386/i386/longrun.c | 21 | ||||
-rw-r--r-- | sys/i386/include/profile.h | 10 |
5 files changed, 54 insertions, 70 deletions
diff --git a/sys/i386/i386/elan-mmcr.c b/sys/i386/i386/elan-mmcr.c index b184237..6f63146 100644 --- a/sys/i386/i386/elan-mmcr.c +++ b/sys/i386/i386/elan-mmcr.c @@ -228,19 +228,18 @@ elan_poll_pps(struct timecounter *tc) static int state; int i; uint16_t u, x, y, z; - u_long eflags; + register_t saveintr; /* * Grab the HW state as quickly and compactly as we can. Disable * interrupts to avoid measuring our interrupt service time on * hw with quality clock sources. */ - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); x = *pps_ap[0]; /* state, must be first, see below */ y = *pps_ap[1]; /* timer2 */ z = *pps_ap[2]; /* timer1 */ - write_eflags(eflags); + intr_restore(saveintr); /* * Order is important here. We need to check the state of the GPIO diff --git a/sys/i386/i386/identcpu.c b/sys/i386/i386/identcpu.c index 010a29f..afdedc2 100644 --- a/sys/i386/i386/identcpu.c +++ b/sys/i386/i386/identcpu.c @@ -1037,12 +1037,11 @@ identblue(void) static void identifycyrix(void) { - u_int eflags; + register_t saveintr; int ccr2_test = 0, dir_test = 0; u_char ccr2, ccr3; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); ccr2 = read_cyrix_reg(CCR2); write_cyrix_reg(CCR2, ccr2 ^ CCR2_LOCK_NW); @@ -1067,7 +1066,7 @@ identifycyrix(void) else cyrix_did = 0x00ff; /* Old 486SLC/DLC and TI486SXLC/SXL */ - write_eflags(eflags); + intr_restore(saveintr); } /* Update TSC freq with the value indicated by the caller. */ diff --git a/sys/i386/i386/initcpu.c b/sys/i386/i386/initcpu.c index 75ff6ed..9719782 100644 --- a/sys/i386/i386/initcpu.c +++ b/sys/i386/i386/initcpu.c @@ -116,14 +116,13 @@ u_int cpu_mxcsr_mask; /* valid bits in mxcsr */ static void init_bluelightning(void) { - u_long eflags; + register_t saveintr; #if defined(PC98) && !defined(CPU_UPGRADE_HW_CACHE) need_post_dma_flush = 1; #endif - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); load_cr0(rcr0() | CR0_CD | CR0_NW); invd(); @@ -144,7 +143,7 @@ init_bluelightning(void) /* Enable caching in CR0. */ load_cr0(rcr0() & ~(CR0_CD | CR0_NW)); /* CD = 0 and NW = 0 */ invd(); - write_eflags(eflags); + intr_restore(saveintr); } /* @@ -153,11 +152,10 @@ init_bluelightning(void) static void init_486dlc(void) { - u_long eflags; + register_t saveintr; u_char ccr0; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); invd(); ccr0 = read_cyrix_reg(CCR0); @@ -189,7 +187,7 @@ init_486dlc(void) load_cr0(rcr0() & ~(CR0_CD | CR0_NW)); /* CD = 0 and NW = 0 */ invd(); #endif /* !CYRIX_CACHE_WORKS */ - write_eflags(eflags); + intr_restore(saveintr); } @@ -199,11 +197,10 @@ init_486dlc(void) static void init_cy486dx(void) { - u_long eflags; + register_t saveintr; u_char ccr2; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); invd(); ccr2 = read_cyrix_reg(CCR2); @@ -220,7 +217,7 @@ init_cy486dx(void) #endif write_cyrix_reg(CCR2, ccr2); - write_eflags(eflags); + intr_restore(saveintr); } @@ -230,11 +227,10 @@ init_cy486dx(void) static void init_5x86(void) { - u_long eflags; + register_t saveintr; u_char ccr2, ccr3, ccr4, pcr0; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); load_cr0(rcr0() | CR0_CD | CR0_NW); wbinvd(); @@ -320,29 +316,28 @@ init_5x86(void) /* Lock NW bit in CR0. */ write_cyrix_reg(CCR2, read_cyrix_reg(CCR2) | CCR2_LOCK_NW); - write_eflags(eflags); + intr_restore(saveintr); } #ifdef CPU_I486_ON_386 /* * There are i486 based upgrade products for i386 machines. - * In this case, BIOS doesn't enables CPU cache. + * In this case, BIOS doesn't enable CPU cache. */ static void init_i486_on_386(void) { - u_long eflags; + register_t saveintr; #if defined(PC98) && !defined(CPU_UPGRADE_HW_CACHE) need_post_dma_flush = 1; #endif - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); load_cr0(rcr0() & ~(CR0_CD | CR0_NW)); /* CD = 0, NW = 0 */ - write_eflags(eflags); + intr_restore(saveintr); } #endif @@ -354,11 +349,10 @@ init_i486_on_386(void) static void init_6x86(void) { - u_long eflags; + register_t saveintr; u_char ccr3, ccr4; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); load_cr0(rcr0() | CR0_CD | CR0_NW); wbinvd(); @@ -422,7 +416,7 @@ init_6x86(void) /* Lock NW bit in CR0. */ write_cyrix_reg(CCR2, read_cyrix_reg(CCR2) | CCR2_LOCK_NW); - write_eflags(eflags); + intr_restore(saveintr); } #endif /* I486_CPU */ @@ -435,11 +429,10 @@ init_6x86(void) static void init_6x86MX(void) { - u_long eflags; + register_t saveintr; u_char ccr3, ccr4; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); load_cr0(rcr0() | CR0_CD | CR0_NW); wbinvd(); @@ -489,7 +482,7 @@ init_6x86MX(void) /* Lock NW bit in CR0. */ write_cyrix_reg(CCR2, read_cyrix_reg(CCR2) | CCR2_LOCK_NW); - write_eflags(eflags); + intr_restore(saveintr); } static void @@ -513,11 +506,10 @@ static void init_mendocino(void) { #ifdef CPU_PPRO2CELERON - u_long eflags; + register_t saveintr; u_int64_t bbl_cr_ctl3; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); load_cr0(rcr0() | CR0_CD | CR0_NW); wbinvd(); @@ -541,7 +533,7 @@ init_mendocino(void) } load_cr0(rcr0() & ~(CR0_CD | CR0_NW)); - write_eflags(eflags); + intr_restore(saveintr); #endif /* CPU_PPRO2CELERON */ } @@ -842,10 +834,9 @@ enable_K6_wt_alloc(void) { quad_t size; u_int64_t whcr; - u_long eflags; + register_t saveintr; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); wbinvd(); #ifdef CPU_DISABLE_CACHE @@ -895,7 +886,7 @@ enable_K6_wt_alloc(void) #endif wrmsr(0x0c0000082, whcr); - write_eflags(eflags); + intr_restore(saveintr); } void @@ -903,10 +894,9 @@ enable_K6_2_wt_alloc(void) { quad_t size; u_int64_t whcr; - u_long eflags; + register_t saveintr; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); wbinvd(); #ifdef CPU_DISABLE_CACHE @@ -956,7 +946,7 @@ enable_K6_2_wt_alloc(void) #endif wrmsr(0x0c0000082, whcr); - write_eflags(eflags); + intr_restore(saveintr); } #endif /* I585_CPU && CPU_WT_ALLOC */ @@ -966,15 +956,14 @@ enable_K6_2_wt_alloc(void) DB_SHOW_COMMAND(cyrixreg, cyrixreg) { - u_long eflags; + register_t saveintr; u_int cr0; u_char ccr1, ccr2, ccr3; u_char ccr0 = 0, ccr4 = 0, ccr5 = 0, pcr0 = 0; cr0 = rcr0(); if (cpu_vendor_id == CPU_VENDOR_CYRIX) { - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); if ((cpu != CPU_M1SC) && (cpu != CPU_CY486DX)) { @@ -992,7 +981,7 @@ DB_SHOW_COMMAND(cyrixreg, cyrixreg) pcr0 = read_cyrix_reg(PCR0); write_cyrix_reg(CCR3, ccr3); /* Restore CCR3. */ } - write_eflags(eflags); + intr_restore(saveintr); if ((cpu != CPU_M1SC) && (cpu != CPU_CY486DX)) printf("CCR0=%x, ", (u_int)ccr0); diff --git a/sys/i386/i386/longrun.c b/sys/i386/i386/longrun.c index a75726e..08fe3b1 100644 --- a/sys/i386/i386/longrun.c +++ b/sys/i386/i386/longrun.c @@ -84,12 +84,11 @@ static u_int32_t longrun_modes[LONGRUN_MODE_MAX][3] = { static u_int tmx86_get_longrun_mode(void) { - u_long eflags; + register_t saveintr; union msrinfo msrinfo; u_int low, high, flags, mode; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); msrinfo.msr = rdmsr(MSR_TMx86_LONGRUN); low = LONGRUN_MODE_MASK(msrinfo.regs[0]); @@ -105,40 +104,38 @@ tmx86_get_longrun_mode(void) } mode = LONGRUN_MODE_UNKNOWN; out: - write_eflags(eflags); + intr_restore(saveintr); return (mode); } static u_int tmx86_get_longrun_status(u_int * frequency, u_int * voltage, u_int * percentage) { - u_long eflags; + register_t saveintr; u_int regs[4]; - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); do_cpuid(0x80860007, regs); *frequency = regs[0]; *voltage = regs[1]; *percentage = regs[2]; - write_eflags(eflags); + intr_restore(saveintr); return (1); } static u_int tmx86_set_longrun_mode(u_int mode) { - u_long eflags; + register_t saveintr; union msrinfo msrinfo; if (mode >= LONGRUN_MODE_UNKNOWN) { return (0); } - eflags = read_eflags(); - disable_intr(); + saveintr = intr_disable(); /* Write LongRun mode values to Model Specific Register. */ msrinfo.msr = rdmsr(MSR_TMx86_LONGRUN); @@ -153,7 +150,7 @@ tmx86_set_longrun_mode(u_int mode) msrinfo.regs[0] = (msrinfo.regs[0] & ~0x01) | longrun_modes[mode][2]; wrmsr(MSR_TMx86_LONGRUN_FLAGS, msrinfo.msr); - write_eflags(eflags); + intr_restore(saveintr); return (1); } diff --git a/sys/i386/include/profile.h b/sys/i386/include/profile.h index fb3320b..d4db0c9 100644 --- a/sys/i386/include/profile.h +++ b/sys/i386/include/profile.h @@ -77,17 +77,17 @@ #error #endif /* !__GNUCLIKE_ASM */ #else /* !GUPROF */ -#define MCOUNT_DECL(s) u_long s; +#define MCOUNT_DECL(s) register_t s; #ifdef SMP extern int mcount_lock; -#define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); \ +#define MCOUNT_ENTER(s) { s = intr_disable(); \ while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \ /* nothing */ ; } #define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \ - write_eflags(s); } + intr_restore(s); } #else -#define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); } -#define MCOUNT_EXIT(s) (write_eflags(s)) +#define MCOUNT_ENTER(s) { s = intr_disable(); } +#define MCOUNT_EXIT(s) (intr_restore(s)) #endif #endif /* GUPROF */ |